Chasing down a miss. Want to avoid a shock

[Ernzo]

I've used my inductive timing light. Hook it up to each plug wire as close to the plug as possible, then pull the trigger on the light. Shine the light on a dark surface and see how regular it is. If there is spark, it will set off the light. If it is a good regular spark, the light will reflect that. Plus, timing lights come in handy for setting the timing

I dig this, and this is a good way to really "see" the condition of the wires, correct? A bad wire will look different, weak. A fouled plug the same?